Comparison of Efficiency of Closed Kinetic Chain Exercises Versus Proprioceptive Exercises in Improving Balance and Gait in People With Hemophilia: Protocol for a Randomized Controlled Trial - Tugce Poyraz Isleyen; Ela Tarakci; Gokce Leblebici; Ipek Yeldan; Bulent Zulfikar (JMIR Research Protocols)